Apple iMac G5, 20-inch User Manual Page 265
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- TROUBLESHOOTING
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iMac G5, 20-inch Troubleshooting - 41
Symptom Charts
Hard Drive
In a hard drive failure, the computer fails to boot to the desktop and may
display a flashing question mark, or an alternating question mark and Mac
OS (face o a folder)
1. Restart the computer with the Apple Hardware Test (AHT) disc that came with the
computer. Run the Quick/Extended test.
2. Does the Apple Hardware Test test pass?
Yes: Run Disk repair from the Install CD that came with the computer.
No: Replace the component indicated by Apple Hardware Test, go on to the next
step.
3. Does the computer start up properly now?
Yes: Problem resolved.
No: Reinstall system software. Go on to the next step.
4. Does the computer start up properly now?
Yes: Problem resolved.
No: Replace the hard drive. Does the computer work now?
– Yes: Problem resolved.
– No: Replace the logic board.
System hangs during normal startup process
1. Boot from the system CD that came with the computer and see if the hard drive
mounts on the desktop.
2. Using Drive Setup, reinstall the system software drivers for the hard drive.
3. Check all cable connections to and from the hard drive.
4. Replace the hard drive.
5. Replace the logic board.
- Service Source 1
- Take Apart 2
- Important Things to Know 4
- Removing the Back Cover 5
- Procedure 6
- Replacing the Back Cover 8
- Replacing the Back Cover 9
- Serial ATA Hard Drive 11
- Serial ATA Hard Drive 13
- Optical Drive 17
- Removing the Optical Drive 18
- Replacing the Optical Drive 21
- Microfoam Shim 25
- Inverter 29
- Removing the Inverter 30
- Inverter 33
- Replacing the Inverter 37
- Fans, Upper 44
- Removing the Fans 45
- Replacing the Fans 49
- Memory (DIMMs) 52
- Removing the Memory 54
- Replacing the Memory 55
- Logic Board 56
- Removing the Logic Board 58
- Logic Board 62
- Bluetooth board aside 62
- Replacing the Logic Board 65
- 21. Replace the memory 74
- 23. Replace the back cover 74
- Power Supply 75
- Removing the Power Supply 76
- Power Supply 78
- Replacing the Power Supply 81
- AirPort Extreme Card 84
- AirPort Extreme Card 86
- AirPort Extreme Card Holder 90
- AirPort Extreme Card Holder 91
- Preliminary Steps 93
- Removing the Battery 94
- Battery 95
- Replacing the Battery 98
- Hard Drive Duct 100
- Removing the Hard Drive Duct 101
- Replacing the Hard Drive Duct 102
- Bluetooth Board 103
- Removing the Bluetooth Board 104
- Replacing the Bluetooth Board 105
- Air Deflector 106
- Removing the Air Deflector 107
- Replacing the Air Deflector 108
- Air Deflector 109
- 4. Replace the back cover 109
- Modem Board 110
- Removing the Modem Board 111
- Replacing the Modem Board 112
- Midplane Assembly 114
- Midplane Assembly 116
- Replacing the Midplane 133
- (circled below) 146
- Midplane Assembly-Short Cut 147
- Midplane Assembly-Short Cut 149
- Bluetooth Antenna Cable 174
- Bluetooth Antenna Cable 175
- LCD Panel 179
- Removing the LCD Panel 180
- LCD Panel 181
- Replacing the LCD Panel 182
- Front Bezel 184
- Removing the Front Bezel 185
- Replacing the Front Bezel 186
- Front Bezel 189
- 12. Replace the back cover 189
- Light Pipe with Gasket 190
- Light Pipe with Gasket 191
- 4. Replace the midplane 193
- 5. Replace the back cover 193
- Microphone Cable 194
- Removing the Microphone Cable 195
- Microphone Cable 196
- Speaker Set 200
- Removing the Speaker Set 201
- Speaker Set 203
- Replacing the Speaker Set 208
- Lower Fan 209
- Removing the Lower Fan 210
- Lower Fan 212
- Replacing the Lower Fan 213
- AirPort Extreme Antenna Cable 214
- Midplane Chassis 219
- Part Location 220
- Removing the Midplane Chassis 221
- Midplane Chassis 222
- Troubleshooting 224
- General Information 225
- Eligible Products 226
- Repair Strategy 227
- Replacement Parts 228
- Special CompTIA Codes 228
- Latin America 229
- Amendment: iMac G5 Repair 230
- Extension Program for Power 230
- Supply Issues 230
- Apple Retail 233
- European IMCs: 234
- Latin America: 234
- Troubleshooting Video Issues 235
- Troubleshooting Power Issues 239
- Serial Number Location 244
- Diagnostic LEDs 245
- Internal Power Button 249
- SMU Button 251
- DDR Memory 253
- Symptom Charts 254
- Power Issues 255
- No Video 259
- Scrambled or distorted video 262
- Symptom Charts 263
- Yes: Problem solved 263
- No: Replace the logic board 263
- Hard Drive 265
- Inserting Discs Issue 269
- Fan Sound 270
- Speakers 276
- My mouse doesn’t work at all 277
- Keyboard 278
- Certain keys don't work 279
- Error Beep(s) 281
- Screw Matrix for 20-inch 284
- Screw Locators 285
- To Access the Inverter 286
- To Access the Hard Drive 287
- Screw Locators 288
- Repair Extension Program 294
- Repair Extension Program for 295
- Video and Power Issues 295
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